18877780

素因数分解:

$2^2\times 5^1\times {\mathrm{113}}^1\times {\mathrm{8353}}^1$

素因数の和:8475

約数の個数: 24

約数和(自身を含む): 39998952

約数和(自身を除く): 21121172

約数列:

[1, 2, 4, 5, 10, 20, 113, 226, 452, 565, 1130, 2260, 8353, 16706, 33412, 41765, 83530, 167060, 943889, 1887778, 3775556, 4719445, 9438890, 18877780]

約数ペア:

[(1, 18877780), (2, 9438890), (4, 4719445), (5, 3775556), (10, 1887778), (20, 943889), (113, 167060), (226, 83530), (452, 41765), (565, 33412), (1130, 16706), (2260, 8353)]